You can rule out the Rally Sport. For the base LF7 (327/210) and the optional L30 (327/275), the BP axle (2.73) came on non-RS cars. (RS cars got a 3.08.) And as memtioned before, you don't have the factory hole for the 4 speed, so the car came with a Powerglide automatic transmission.

So no way to know for sure which engine it originally came with, but the more common engine by a long shot was the base LF7 (124,870 vs 21,686 L30's), so that's probably what the car started life as.

thanks for the info guys sorry i had college all day today and didnt have a chance to get on here. yes KurtS the backup lights are under the bumper and also has the hidden headlights like in RS but like i said earlier this could have been installed by a previous owner so i have no real way to tell if it is original. whether or not the car is just a base camaro or RS or anything else really is just for my own curiosity in being able to know what it was originally but other than that there is no monetary value for me needing to know because i dont plan on ever selling the car. it is just nice to know what I have and i really appreciate the insight you guys have given me so far thank you.